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https://www.readbyqxmd.com/read/28335297/rotation-of-magnetization-derived-from-brownian-relaxation-in-magnetic-fluids-of-different-viscosity-evaluated-by-dynamic-hysteresis-measurements-over-a-wide-frequency-range
#1
Satoshi Ota, Ryoichi Kitaguchi, Ryoji Takeda, Tsutomu Yamada, Yasushi Takemura
The dependence of magnetic relaxation on particle parameters, such as the size and anisotropy, has been conventionally discussed. In addition, the influences of external conditions, such as the intensity and frequency of the applied field, the surrounding viscosity, and the temperature on the magnetic relaxation have been researched. According to one of the basic theories regarding magnetic relaxation, the faster type of relaxation dominates the process. However, in this study, we reveal that Brownian and Néel relaxations coexist and that Brownian relaxation can occur after Néel relaxation despite having a longer relaxation time...
September 10, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333464/quantification-of-thermodynamic-hydridicity-of-hydride-complexes-of-mn-re-mo-and-w-using-molecular-electrostatic-potential
#2
Sandhya Karakkadparambil Sankaran, Cherumuttathu H Suresh
Molecular electrostatic potential (MESP) at the hydride nucleus, VH is proposed as a powerful measure of the hydride donor ability (hydridicity) of metal hydride complexes. The VH alues are determined for several group VI and group VII octahedral metal hydride complexes of Mo, W, Mn and Re at the B3LYP level of DFT. Further, the hydridicity, defined by the thermodynamic parameter ΔG(o)H- is determined for all these complexes using a thermodynamic cycle which describes the hydride abstraction reaction by H3O(+) ion...
March 23, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28333365/clozapine-combined-with-different-antipsychotic-drugs-for-treatment-resistant-schizophrenia
#3
REVIEW
Sarah Barber, Uwaila Olotu, Martina Corsi, Andrea Cipriani
BACKGROUND: Between 40% and 70% of people with treatment-resistant schizophrenia do not respond to clozapine, despite adequate blood levels. For these people, a number of treatment strategies have emerged, including the prescription of a second anti-psychotic drug in combination with clozapine. OBJECTIVES: To determine the clinical effects of various clozapine combination strategies with antipsychotic drugs in people with treatment-resistant schizophrenia both in terms of efficacy and tolerability...
March 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28333222/ivf-or-iui-as-first-line-treatment-in-unexplained-subfertility-the-conundrum-of-treatment-selection-markers
#4
R I Tjon-Kon-Fat, P Tajik, M H Zafarmand, A J Bensdorp, P M M Bossuyt, G J E Oosterhuis, R van Golde, S Repping, M D A Lambers, E Slappendel, D Perquin, M J Pelinck, J Gianotten, J W M Maas, M J C Eijkemans, F van der Veen, B W Mol, M van Wely
STUDY QUESTION: Are there treatment selection markers that could aid in identifying couples, with unexplained or mild male subfertility, who would have better chances of a healthy child with IVF with single embryo transfer (IVF-SET) than with IUI with ovarian stimulation (IUI-OS)? SUMMARY ANSWER: We did not find any treatment selection markers that were associated with better chances of a healthy child with IVF-SET instead of IUI-OS in couples with unexplained or mild male subfertility...
February 24, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333120/an-analytical-model-for-bds-b1-spreading-code-self-interference-evaluation-considering-nh-code-effects
#5
Xin Zhang, Xingqun Zhan, Shaojun Feng, Washington Ochieng
The short spreading code used by the BeiDou Navigation Satellite System (BDS) B1-I or GPS Coarse/Acquistiion (C/A) can cause aggregately undesirable cross-correlation between signals within each single constellation. This GPS-to-GPS or BDS-to-BDS correlation is referred to as self-interference. A GPS C/A code self-interference model is extended to propose a self-interference model for BDS B1, taking into account the unique feature of the B1-I signal transmitted by BDS medium Earth orbit (MEO) and inclined geosynchronous orbit (IGSO) satellites-an extra Neumann-Hoffmann (NH) code...
March 23, 2017: Sensors
https://www.readbyqxmd.com/read/28332675/tailoring-the-structure-and-thermoelectric-properties-of-batio3via-eu-2-substitution
#6
Xingxing Xiao, Marc Widenmeyer, Wenjie Xie, Tianhua Zou, Songhak Yoon, Marco Scavini, Stefano Checchia, Zhicheng Zhong, Philipp Hansmann, Stefan Kilper, Andrei Kovalevsky, Anke Weidenkaff
A series of Ba1-xEuxTiO3-δ (0.1 ≤ x ≤ 0.9) phases with ∼40 nm particle size were synthesized via a Pechini method followed by annealing and sintering under a reducing atmosphere. The effects of Eu(2+) substitution on the BaTiO3 crystal structure and the thermoelectric transport properties were systematically investigated. According to synchrotron X-ray diffraction data only cubic perovskite structures were observed. On the local scale below about 20 Å (equal to ∼5 unit cells) deviations from the cubic structure model (Pm3[combining macron]m) were detected by evaluation of the pair distribution function (PDF)...
March 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28332484/multivariate-regression-methods-for-estimating-velocity-of-ictal-discharges-from-human-microelectrode-recordings
#7
Jyun-You Liou, Elliot Smith, Lisa Bateman, Guy McKhann, Robert Goodman, Bradley Greger, Tyler Davis, Spencer Kellis, Paul House, Catherine Schevon
OBJECTIVE: Epileptiform discharges, an electrophysiological hallmark of seizures, can propagate across cortical tissue in a manner similar to traveling waves. Recent work has focused attention on the origination and propagation patterns of these discharges, yielding important clues to their source location and mechanism of travel. However, systematic studies of methods for measuring propagation are lacking. APPROACH: We analyzed epileptiform discharges in microelectrode array recordings of human seizures...
March 23, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28332407/unsteady-computational-fluid-dynamics-in-front-crawl-swimming
#8
Mathias Samson, Anthony Bernard, Tony Monnet, Patrick Lacouture, Laurent David
The development of codes and power calculations currently allows the simulation of increasingly complex flows, especially in the turbulent regime. Swimming research should benefit from these technological advances to try to better understand the dynamic mechanisms involved in swimming. An unsteady Computational Fluid Dynamics (CFD) study is conducted in crawl, in order to analyse the propulsive forces generated by the hand and forearm. The k-ω SST turbulence model and an overset grid method have been used...
March 23, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28332113/the-critical-power-concept-applications-to-sports-performance-with-a-focus-on-intermittent-high-intensity-exercise
#9
REVIEW
Andrew M Jones, Anni Vanhatalo
The curvilinear relationship between power output and the time for which it can be sustained is a fundamental and well-known feature of high-intensity exercise performance. This relationship 'levels off' at a 'critical power' (CP) that separates power outputs that can be sustained with stable values of, for example, muscle phosphocreatine, blood lactate, and pulmonary oxygen uptake ([Formula: see text]), from power outputs where these variables change continuously with time until their respective minimum and maximum values are reached and exercise intolerance occurs...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332042/the-effect-of-wi-fi-electromagnetic-waves-in-unimodal-and-multimodal-object-recognition-tasks-in-male-rats
#10
Amin Hassanshahi, Seyed Ali Shafeie, Iman Fatemi, Elham Hassanshahi, Mohammad Allahtavakoli, Mohammad Shabani, Ali Roohbakhsh, Ali Shamsizadeh
Wireless internet (Wi-Fi) electromagnetic waves (2.45 GHz) have widespread usage almost everywhere, especially in our homes. Considering the recent reports about some hazardous effects of Wi-Fi signals on the nervous system, this study aimed to investigate the effect of 2.4 GHz Wi-Fi radiation on multisensory integration in rats. This experimental study was done on 80 male Wistar rats that were allocated into exposure and sham groups. Wi-Fi exposure to 2.4 GHz microwaves [in Service Set Identifier mode (23...
March 22, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28331357/effectiveness-of-ultrasound-therapy-for-myofascial-pain-syndrome-a-systematic-review-and-meta-analysis
#11
REVIEW
Peng Xia, Xiaoju Wang, Qiang Lin, Kai Cheng, Xueping Li
OBJECTIVE: The objective of this review was to assess the therapeutic effect of ultrasound (US) on myofascial pain syndrome (MPS). DATE SOURCES: PubMed, Embase, and Cochrane Library were searched to find relevant studies from January 1966 to May 2016 using keywords. Four investigators performed the data extraction. STUDY SELECTION: Randomized controlled trials (RCTs) investigating the outcomes of pain and physical function between MPS patients receiving and not receiving US were selected by two researchers independently...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28329279/performance-of-hospitals-according-to-the-esc-acca-quality-indicators-and-30-day-mortality-for-acute-myocardial-infarction-national-cohort-study-using-the-united-kingdom-myocardial-ischaemia-national-audit-project-minap-register
#12
Owen Bebb, Marlous Hall, Keith A A Fox, Tatendashe B Dondo, Adam Timmis, Hector Bueno, François Schiele, Chris P Gale
Aims: To investigate the application of the European Society of Cardiology Acute Cardiovascular Care Association quality indicators (QI) for acute myocardial infarction for the study of hospital performance and 30-day mortality. Methods and results: National cohort study (n = 118,075 patients, n = 211 hospitals, MINAP registry), 2012-13. Overall, 16 of the 20 QIs could be calculated. Eleven QIs had a significant inverse association with GRACE risk adjusted 30-day mortality (all P < 0...
February 20, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329272/thoracoscopic-surgery-versus-open-surgery-for-lung-metastases-of-colorectal-cancer-a-multi-institutional-retrospective-analysis-using-propensity-score-adjustment%C3%A2
#13
Tomohiro Murakawa, Hajime Sato, Sakae Okumura, Jun Nakajima, Hirotoshi Horio, Yuichi Ozeki, Hisao Asamura, Norihiko Ikeda, Hajime Otsuka, Haruhisa Matsuguma, Ichiro Yoshino, Masayuki Chida, Mitsuo Nakayama, Toshihiko Iizasa, Meinoshin Okumura, Satoshi Shiono, Ryoichi Kato, Tomohiko Iida, Noriyuki Matsutani, Masafumi Kawamura, Yukinori Sakao, Kazuhito Funai, Go Furuyashiki, Hirohiko Akiyama, Shigeki Sugiyama, Naoki Kanauchi, Yuji Shiraishi
OBJECTIVES: Thoracoscopic surgery for lung metastasectomy remains controversial. The study aimed at determining the efficacy of thoracoscopic surgery for lung metastasectomy. METHODS: This was a multi-institutional, retrospective study that included 1047 patients who underwent lung metastasectomy for colorectal cancer between 1999 and 2014. Prognostic factors of overall survival were compared between the thoracoscopic and open thoracotomy groups using the multivariate Cox proportional hazard model...
February 16, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28329023/hydro-wind-and-solar-power-as-a-base-for-a-100-renewable-energy-supply-for-south-and-central-america
#14
Larissa de Souza Noel Simas Barbosa, Dmitrii Bogdanov, Pasi Vainikka, Christian Breyer
Power systems for South and Central America based on 100% renewable energy (RE) in the year 2030 were calculated for the first time using an hourly resolved energy model. The region was subdivided into 15 sub-regions. Four different scenarios were considered: three according to different high voltage direct current (HVDC) transmission grid development levels (region, country, area-wide) and one integrated scenario that considers water desalination and industrial gas demand supplied by synthetic natural gas via power-to-gas (PtG)...
2017: PloS One
https://www.readbyqxmd.com/read/28328984/using-simulation-to-aid-trial-design-ring-vaccination-trials
#15
Matt David Thomas Hitchings, Rebecca Freeman Grais, Marc Lipsitch
BACKGROUND: The 2014-6 West African Ebola epidemic highlights the need for rigorous, rapid clinical trial methods for vaccines. A challenge for trial design is making sample size calculations based on incidence within the trial, total vaccine effect, and intracluster correlation, when these parameters are uncertain in the presence of indirect effects of vaccination. METHODS AND FINDINGS: We present a stochastic, compartmental model for a ring vaccination trial. After identification of an index case, a ring of contacts is recruited and either vaccinated immediately or after 21 days...
March 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28328716/vertical-jump-and-leg-power-normative-data-for-colombian-schoolchildren-aged-9-17-9-years-the-fuprecol-study
#16
Robinson Ramírez-Vélez, Jorge E Correa-Bautista, Felipe Lobelo, Eduardo L Cadore, Alicia M Alonso-Martinez, Mikel Izquierdo
Ramírez-Vélez, R, Correa-Bautista, JE, Lobelo, F, Cadore, EL, Alonso-Martinez, AM, and Izquierdo, M. Vertical jump and leg power normative data for Colombian schoolchildren aged 9-17.9 years: the FUPRECOL study. J Strength Cond Res 31(4): 990-998, 2017-The aims of the present study were to generate normative vertical jump height and predicted peak power (Ppeak) data for 9- to 17.9-year-olds and to investigate between-sex and age group differences in these measures. This was a cross-sectional study of 7,614 healthy schoolchildren (boys n = 3,258 and girls n = 4,356, mean [SD] age 12...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28328527/on-the-conditional-power-in-survival-time-analysis-considering-cure-fractions
#17
Andreas Kuehnapfel, Fabian Schwarzenberger, Markus Scholz
Conditional power of survival endpoints at interim analyses can support decisions on continuing a trial or stopping it for futility. When a cure fraction becomes apparent, conditional power cannot be calculated accurately using simple survival models, e.g. the exponential model. Non-mixture models consider such cure fractions. In this paper, we derive conditional power functions for non-mixture models, namely the non-mixture exponential, the non-mixture Weibull, and the non-mixture Gamma models. Formulae were implemented in the R package CP...
March 17, 2017: International Journal of Biostatistics
https://www.readbyqxmd.com/read/28328291/evaluation-of-multi-parameter-test-statistics-for-multiple-imputation
#18
Yu Liu, Craig K Enders
In Ordinary Least Square regression, researchers often are interested in knowing whether a set of parameters is different from zero. With complete data, this could be achieved using the gain in prediction test, hierarchical multiple regression, or an omnibus F test. However, in substantive research scenarios, missing data often exist. In the context of multiple imputation, one of the current state-of-art missing data strategies, there are several different analogous multi-parameter tests of the joint significance of a set of parameters, and these multi-parameter test statistics can be referenced to various distributions to make statistical inferences...
March 22, 2017: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/28327972/orthogonal-decomposition-of-left-ventricular-remodelling-in-myocardial-infarction
#19
Xingyu Zhang, Pau Medrano-Gracia, Bharath Ambale-Venkatesh, David A Bluemke, Brett R Cowan, J Paul Finn, Alan H Kadish, Daniel C Lee, Joao A C Lima, Alistair A Young, Avan Suinesiaputra
Background: Left ventricular size and shape is important for quantifying cardiac remodelling in response to cardiovascular disease. Geometric remodelling indices have been shown to have prognostic value in predicting adverse events in the clinical literature, but these often describe interrelated shape changes. We developed a novel method for deriving orthogonal remodelling components directly from any (moderately independent) set of clinical remodelling indices. Results: Six clinical remodelling indices (end-diastolic volume index, sphericity, relative wall thickness, ejection fraction, apical conicity and longitudinal shortening) were evaluated using cardiac magnetic resonance images of 300 patients with myocardial infarction, and 1991 asymptomatic subjects, obtained from the Cardiac Atlas Project...
February 6, 2017: GigaScience
https://www.readbyqxmd.com/read/28327894/statistical-controversies-in-clinical-research-overlap-and-errors-in-the-meta-analyses-of-microrna-genetic-association-studies-in-cancers
#20
J H Park, M Eisenhut, H J Vliet, J I Shin
Background: : Various errors in the design, conduct, and analysis of medical and public health research studies can produce false results and waste valuable resources. While systematic reviews and meta-analyses are arguably considered the most dependable source of evidence-based medicine, increasing numbers of studies are indicating that, on the contrary to the public's belief, many of these investigations are redundant, erroneous, and even biased. Methods: 94 meta-analyses on microRNA polymorphism and risk of cancer were extracted from Pubmed database on August 2016...
January 24, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
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